Android Question Remove leading Zero's

[ilan]

hi

i have a list of files. files are named (1.txt,2.txt,.....23.txt,...)
now i add all to a list and i want to sort them but i get

1.txt
11.txt
12.txt
...

so i use numberformat with 4 digits like (0001,0002,..) now i get the right order
but after i have sorted the list i want to remove all leading "0" of all items

i tried to get the item and change it to int r=or double and it didnot work.
numberformat(NR,1,0) does not work either.

what else could i try??

thanx

 

[moster67]

something silly like converting string into Int/Long and then reconvert them back to string...

 

[stevel05]

If they are all .txt files, you could remove the extension and sort the list (I think it will then sort in true number order) Then add the extension back again afterwards.

Alternatively, you could create a Type and add just the numbers to a sort field and the name to a second field, add the types to a list, sort it, then extract the names in order.

 

[stevel05]

Or another thought keep the zero fill, then remove the .txt extension and cast the numeric part to an int, then add the extension back again.

 

[ilan]

Or another thought keep the zero fill, then remove the .txt extension and cast the numeric part to an int, then add the extension back again.

this is exactly what i have done, i remove the ".txt" with string.replace(".txt","")
and change the number to a 4 digit number with numberformat but when i try to convert it to an int i get an error "invalid double..."

so its not working

i also wrote that it on the first post.

 

[ilan]

** Service (starter) Create **
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
** Activity (main) Create, isFirst = false **
** Activity (main) Resume **
start sorting list
item: 0,001
Error occurred on line: 1245 (Main)
java.lang.NumberFormatException: Invalid double: "0,001"
at java.lang.StringToReal.invalidReal(StringToReal.java:63)
at java.lang.StringToReal.initialParse(StringToReal.java:164)
at java.lang.StringToReal.parseDouble(StringToReal.java:282)
at java.lang.Double.parseDouble(Double.java:301)
at anywheresoftware.b4a.debug.RDebugUtils.numberCast(RDebugUtils.java:50)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:697)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:336)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:246)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:134)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:157)
at anywheresoftware.b4a.debug.Debug.delegate(Debug.java:262)
at www.sagital.eightbit.main._sortfilelist(main.java:4168)
at www.sagital.eightbit.main._setframeorder(main.java:1712)
at www.sagital.eightbit.main._resetpixelpanel(main.java:928)
at www.sagital.eightbit.main._activity_resume(main.java:867)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:697)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:339)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:246)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:134)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:153)
at www.sagital.eightbit.main.afterFirstLayout(main.java:108)
at www.sagital.eightbit.main.access$000(main.java:17)
at www.sagital.eightbit.main$WaitForLayout.run(main.java:80)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5832)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)

 

[stevel05]

You have a comma in the number, change Numberformat so it doesn't use a thousands indicator.

 

[ilan]

ok now i understand what was the problem when i used numberformat(NR,4,0) it returned 0,001 (i dont know why there was a ,) but if i used 3 instead of 4 it worked

 

[ilan]

You have a comma in the number, change Numberformat so it doesn't use a thousands indicator.

we wrote the same answer at the same moment

 

[stevel05]

Numberformat2 allows you to turn off the number grouping so you could still use 4 digits if you need to.

 

[ilan]

Numberformat2 allows you to turn off the number grouping so you could still use 4 digits if you need to.

thanx